[Building Sakai] Resource content type and version 1.5 PDFs

[Joshua Swink]

Recently we've had some version 1.5 PDFs uploaded to resources, and
they're not recognized by Sakai. They are "unknown". Their filenames
end in ".pdf".

Two questions. First, can we update our server's type recognition to
identify these files correctly? Second, shouldn't it be picking up on
the ".pdf" extension, even if the internal content of the file may not
be recognized?

Josh